By Max HunderKYIV, March 5 (Reuters) - The U.S. and Qatar are in discussions with Kyiv about acquiring Ukrainian interceptor drones as a cheap alternative to down Iranian Shahed UAVs amid the war in the Gulf, a source familiar with the matter told Reuters.The early-stage talks are taking place between government officials, not companies, and the technology being discussed includes systems to listen out for incoming enemy drones and disrupt their communication signals, the source said.